@Richard, thanks for your openness - I have a similar attitude at The Magic Network... even if a member just joins to upload their videos, or photos, or put a link to their site, that is fine. Of course, the more participation the better, but we all know everyone is busy.
@Larry, it is hard to see the value proposition unless you actually join and participate. Social networks are changing the way we communicate (to paraphrase a recent statement by Obama), and sure, I agree, there are tonnes of them out there, but some of them are really good. I didn't see the value of Facebook and Twitter when I first heard of them, but now I do, and so have many others.
Some things that you can do on the Magic Network that you can't do on many other social networks include: creating private discussion groups, posting classified ads on a dedicated classifieds page, participating in live group chat rooms, selling instant downloads, and winning prizes in contests. You can do this on some social networks, but not many. Of course, then there are the standard features, like adding videos and photos to the galleries, joining public groups, adding your events to the calendar, private messaging, etc.
It may not be everyone's cup of tea, but if it is, you can really use it to your advantage to get more people interested in your magic. There are already a few examples of how this has happened at the Magic Network.